High output magnetic inertial force generator

• US 20050168307A1
• Filed: 02/04/2004
• Published: 08/04/2005
• Est. Priority Date: 02/04/2004
• Status: Abandoned Application

• Current Assignee: General Motors Corporation (General Motors Company)
• Original Assignee: General Motors Corporation (General Motors Company)
• Inventors: Reynolds, Michael G., Goodwin, William C.
• Application Number:
  US10/772,008
• Publication Number:
  US 20050168307A1
• Time in Patent Office: Days
• US Class Current: 335/220
• CPC Class Codes: F16F 15/03 using magnetic or electromagnetic means F16F9/53, F16F15/005 take precedence
• CPC Class Codes: F16F 6/00 Magnetic springs magnetic spring arrangements for the suppression of vibration in systems F16F15/03; Fluid magnetic springs , i.e. magnetic spring combined with a fluid
• CPC Class Codes: H01F 7/0236 Magnetic suspension or levitation for vehicles B60L13/04; magnetic bearings F16C39/063
• CPC Class Codes: H01F 7/122 by permanent magnets H01F7/1615, H01F7/1646 take precedence
• CPC Class Codes: H01F 7/1615 Armatures or stationary parts of magnetic circuit having permanent magnet
• CPC Class Codes: H02K 33/16 with polarised armatures moving in alternate directions by reversal or energisation of a single coil system

Abstract

A magnetic force generator includes a magnetic shell internally defining an armature chamber. At least three circumferential electric coils are spaced axially within the chamber. An armature supported in the chamber for reciprocation therein includes a plurality of aligned magnets separated by at least one intermediate magnetic steel plate sandwiched between like poles of adjoining magnets and a pair of end steel magnetic plates on opposite ends of the armature. The plates extend laterally to a periphery of the armature in general lateral alignment with the electric coils. Springs nominally center the armature between non-magnetic ends of the chamber. Controlled energizing of the coils reciprocates the armature axially relative to the shell to develop an opposite inertia force on the shell for application to a connected body. The use of multiple magnets improves performance and/or reduces cost compared to a single magnet of comparable size.

Claims

1. A magnetic force generator comprising:

a magnetic shell internally defining an armature chamber having an axis;

at least three circumferential electric coils spaced axially within the chamber;

an armature supported in the chamber for reciprocation on the axis, the armature including a plurality of aligned magnets separated by at least one intermediate magnetic steel plate sandwiched between like poles of adjoining magnets and a pair of end steel magnetic plates on opposite ends of the armature, the plates extending laterally to a periphery of the armature in general lateral alignment with the electric coils; and

resilient members nominally centering the armature between non-magnetic ends of the chamber;

controlled energizing of the coils being operative on the magnetic plates to reciprocate the armature axially in a controlled manner relative to the shell to develop an opposite inertia force on the shell for application to a connected body.

2. A magnetic force generator as in claim 1 wherein the resilient members are compression springs.

3. A magnetic force generator as in claim 1 wherein the number of aligned magnets is two.

4. A magnetic force generator as in claim 1 wherein the aligned magnets are ring magnets.

5. A magnetic force generator as in claim 1 wherein the number of the intermediate and end steel magnetic plates in the armature is equal to the number of the circumferential electric coils spaced within the shell.

6. A magnetic force generator as in claim 1 wherein the magnetic shell is part of a housing including non-magnetic end members closing the ends of the chamber.

7. A magnetic force generator comprising:

a magnetic shell internally defining an armature chamber having an axis;

at least three circumferential electric coils spaced axially within the chamber;

an armature supported in the chamber for reciprocation on the axis, the armature including a plurality of aligned magnets separated by at least one intermediate magnetic steel plate sandwiched between like poles of adjoining magnets and a pair of end steel magnetic plates on opposite ends of the armature, the plates extending laterally to a periphery of the armature in general lateral alignment with the electric coils; and

resilient members nominally centering the armature between ends of the chamber;

controlled energizing of the coils being operative on the magnetic plates to reciprocate the armature axially in a controlled manner relative to the shell to develop an opposite inertia force on the shell for application to a connected body.